CN218503574U

CN218503574U - Ultrasonic welding tooth structure

Info

Publication number: CN218503574U
Application number: CN202222070858.8U
Authority: CN
Inventors: 段忠福; 姜大为
Original assignee: Wuxi Jiaocheng Intelligent Technology Co ltd
Current assignee: Wuxi Jiaocheng Intelligent Technology Co ltd
Priority date: 2022-08-05
Filing date: 2022-08-05
Publication date: 2023-02-21
Anticipated expiration: 2032-08-05

Abstract

The utility model belongs to the technical field of ultrasonic welding, concretely relates to ultrasonic wave welds tooth structure, including first welding seal limit, second welding seal limit and welding tooth terminal surface, be provided with a plurality of welding tooth on the welding tooth terminal surface, weld tooth terminal surface with form respectively between the first welding seal limit and between the welding tooth terminal surface and the second welding seal limit and weld the tooth inclined plane; the utility model discloses an ultrasonic welding tooth structure, it is excessive through welding tooth inclined plane and fillet that sets up, can weld more utmost point ear foil material number of piles, prevent that the welding object from ftractureing, can effective reduce cost.

Description

Ultrasonic welding tooth structure

Technical Field

The utility model belongs to the technical field of ultrasonic welding, concretely relates to ultrasonic welding tooth structure.

Background

The working principle of the ultrasonic metal welding machine is that an energy converter is utilized to convert electric energy into high-frequency mechanical vibration energy, under the condition of pressurization, two metal sheets (lug foils) to be welded are clamped between a welding head and a bottom die, after high-frequency vibration waves are transmitted to the surface of the upper metal sheet along the welding head, the welding head drives the upper metal sheet to vibrate in a high frequency mode, the bottom die fixes the lower metal sheet, therefore, high-frequency friction is generated between the two metal sheets, molecules at the joint of the metal sheets permeate each other to be combined together, and tight connection is formed.

At present, the traditional welding mode of the power battery generally adopts a welding mode of ultrasonic pre-welding and ultrasonic final welding, the ultrasonic pre-welding mainly aims to ensure that a foil of a welding lug is folded and fixed without scattering, preparation is made for final welding after the following battery core is assembled, the requirement is low, the welding area is small, and the welding requirement can be met without large welding parameters. The ultrasonic final welding mainly aims to connect the tab foil of the battery cell with the positive and negative cover plates, so that the power battery is charged and discharged, the over-flow is large, and the required welding and printing area is enlarged. The requirement for detecting the residual tension after welding is higher.

With the improvement of the endurance mileage of the new energy automobile market, the energy density is improved by improving the energy density of the existing power battery, increasing the number of layers of the cell pole pieces and reducing the thickness of the pole pieces. When the number of layers of the battery core pole piece reaches a certain thickness, the welding mode of ultrasonic final welding cannot meet the welding requirement, so that the problems of welding crack, insufficient welding, no residue and the like are caused, the potential safety hazard of easy heating and battery explosion exists, and the safe use of the power battery cannot be met.

Therefore, it is necessary to improve this to overcome the disadvantages in practical applications.

SUMMERY OF THE UTILITY MODEL

Based on the above-mentioned shortcomings and deficiencies in the prior art, it is an object of the present invention to at least solve one or more of the above-mentioned problems in the prior art, in other words, to provide an ultrasonic welding tooth structure that satisfies one or more of the above-mentioned needs.

In order to achieve the purpose of the utility model, the utility model adopts the following technical scheme:

the utility model provides an ultrasonic wave welds tooth structure, includes that first welding seal edge, second weld the seal edge and weld the tooth terminal surface, it welds the tooth to be provided with a plurality of on the tooth terminal surface, weld the tooth terminal surface with first welding between the seal edge and weld the tooth terminal surface with the second welds and forms respectively between the seal edge and welds the tooth inclined plane.

Preferably, a first fillet transition surface is arranged between the welding tooth inclined surface and the welding tooth end surface.

Preferably, second fillet transition surfaces are respectively arranged between the welding tooth inclined surface and the first welding edge and between the welding tooth inclined surface and the second welding edge.

Preferably, the included angle between the inclined plane of the welding tooth and the end face of the welding tooth is 5-50 degrees.

Preferably, the surface of the welding tooth is provided with a rough layer, and the rough layer is of an etching pattern structure.

As a preferred scheme, the welding teeth are uniformly arranged on the end faces of the welding teeth, and gaps with equal distance are reserved between two adjacent welding teeth.

As a preferred scheme, the welding teeth are of a quadrangular frustum pyramid structure, and the horizontal interfaces of the welding teeth are arranged in a square shape.

Preferably, a third fillet transition surface is arranged among the first welding seal edge, the second welding seal edge and the welding tooth inclined surface.

Preferably, a fourth fillet transition surface is arranged between the welding tooth inclined surface and the welding tooth.

Compared with the prior art, the utility model, beneficial effect is:

the utility model discloses an ultrasonic wave welds tooth structure, it is excessive through welding tooth inclined plane and fillet that sets up, can effectively guarantee to weld more utmost point ear foil material number of piles, prevent that the welding object from ftracturing, can effective reduce cost.

The utility model discloses an ultrasonic wave welds tooth structure and adopts the etching decorative pattern, and effective increase of service life reaches the welding effect that does not weld and splits on-stick ultrasonic bonding tool.

The utility model discloses a welding tooth surface increases rough layer, improves the bonding tool life-span, and welding stability is more excellent.

Drawings

Fig. 1 is a schematic structural view of an ultrasonic welding tooth of the present invention;

fig. 2 is a top view of the ultrasonic welding tooth structure of the present invention;

fig. 3 is a side view of the ultrasonic welding tooth structure of the present invention;

fig. 4 is a schematic view of a welding tooth end surface of the ultrasonic welding tooth structure of the present invention;

FIG. 5 is a working schematic diagram of the utility model during welding;

in the figure: 1, a first welding seal edge, 2, a second welding seal edge, 3 welding tooth end faces, 31 welding teeth, 311 rough layers, 4 welding tooth inclined planes, 41 first fillet transition faces, 42 second fillet transition faces and 43 third fillet transition faces; 44 a fourth radiused transition surface;

the ultrasonic welding device comprises an A energy converter, a B amplitude modulator, a C ultrasonic welding head, a D welding workpiece and an E ultrasonic bottom die.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be obtained from these drawings without inventive effort.

The first embodiment is as follows:

as shown in fig. 1 to 4, the present embodiment provides an ultrasonic welding tooth structure, which includes a first welding print edge 1, a second welding print edge 2, and a welding tooth end surface 3, wherein a plurality of welding teeth 31 are disposed on the welding tooth end surface 3, and welding tooth inclined surfaces 4 are respectively formed between the welding tooth end surface 3 and the first welding print edge 1, and between the welding tooth end surface 3 and the second welding print edge 2.

Specifically, the first welding edge 1, the second welding edge 2 and the welding tooth end face 3 are arranged in a mutually perpendicular mode, so that a square structure is formed. A tooth-welding inclined plane 4 is arranged between the first welding seal edge 1 and the tooth-welding end face 3, correspondingly, a tooth-welding inclined plane 4 is also arranged between the second welding seal edge 2 and the tooth-welding end face 3, and the tooth-welding inclined planes 4 in four directions and the tooth-welding end face 3 keep the same vertical distance. The included angle α between the tooth bevel 4 and the tooth end face 3 can be set to 5-50 degrees, and in this embodiment, the included angle α is set to 25 degrees, and specifically, the included angle α can be set according to the thickness of the ultrasonic tooth welding structure, and is not limited to the angle size of this embodiment.

When this ultrasonic wave welds tooth structure and welding workpiece surface contact, through the welding tooth inclined plane 4 that sets up, can effectually reduce the buffering, avoid causing direct impact and take place to weld the splitting to welding workpiece, more be favorable to improving welding quality.

In this embodiment, a first fillet transition surface 41 is arranged between the welding tooth inclined surface 4 and the welding tooth end surface 3, the fillet radius range of the first fillet transition surface 41 is R0.3-R10, the fillet radius is R5 in this embodiment, and the fillet transition surface can be specifically set according to actual requirements and is not limited to the radius length in this embodiment. By the smooth transition of the first fillet transition surface 41, it is possible to prevent the welding work from being deformed excessively to cause breakage when vibrating upward or downward at the time of welding, resulting in poor welding.

Further, weld between tooth inclined plane 4 and the first seal limit 1 and weld tooth inclined plane 4 and second and weld and be equipped with the excessive face of second fillet 42 between seal limit 2 respectively, the fillet radius scope of the excessive face 42 of second fillet is R0.3 ~ R1, and the fillet radius is R0.5 in this embodiment, specifically can set up according to the actual demand, is not limited to the radius length of this embodiment.

Further, a third fillet transition surface 43 is arranged at a corner between the first welding stamp edge 1, the second welding stamp edge 2 and the welding tooth inclined surface 4, a fillet radius range of the third fillet transition surface 43 is R0.3-R10, a fillet radius in this embodiment is R5, and the third fillet transition surface may be specifically set according to actual requirements, and is not limited to the radius length in this embodiment.

Further, a fourth fillet transition surface 44 is arranged between the welding tooth inclined surface 4 and the welding tooth 31, the fillet radius range of the fourth fillet transition surface 44 is R0.5-R10, the fillet radius is R6 in the embodiment, and the fourth fillet transition surface can be specifically set according to actual requirements and is not limited to the radius length of the embodiment.

It should be noted that, through the second fillet transition surface 42, the third fillet transition surface 43 and the fourth fillet transition surface 44, the purpose is to ensure smooth transition between a welding area and a non-welding area, reduce the deformation of a welding workpiece, avoid the occurrence of damage and cracks on the welding surface, improve the welding quality, and simultaneously avoid edges and corners of joints, so that the whole structure is smooth and beautiful.

The welding teeth 31 in this embodiment are uniformly arranged on the welding tooth end surface 3, a gap with an equal distance is left between two adjacent welding teeth 31, the welding teeth 31 are in a quadrangular frustum pyramid structure, and the horizontal boundary of the welding teeth 31 is in a square arrangement. The contact area between the welding teeth and the welding workpiece can be effectively increased, the gripping force is improved, the welding teeth are guaranteed to drive the welding workpiece to vibrate up and down, the welding workpiece is contacted more tightly after being vibrated, and the welding precision is improved to realize the welding function.

Further, be equipped with coarse layer 311 on the horizontal interface of welding the tooth, coarse layer 311 includes wear-resistant coating and anti-sticking coating, can effectively prolong the life of bonding tool, improves welding quality.

Further, the rough layer 311 has an etching pattern structure, which helps to increase the friction between the welding tooth 31 and the welding workpiece. The etched patterns have a certain height, and the height of the etched patterns is smaller than the laser welding focal length, so that the staggered cross-hatch can be increased on the basis, and the service life can be prolonged.

When the welding of electric core pole piece of power battery was used, the ultrasonic welding tooth structure of this embodiment was installed on the ultrasonic bonding head, welded utmost point ear foil, can guarantee that utmost point ear welds the foil molecule in seal region and interpenetration and combine together, formed inseparable connection.

When the number of layers of the battery core pole piece of the power battery reaches a certain thickness, the ultrasonic welding tooth structure of the embodiment is adopted for welding, so that the problems of welding crack, cold solder joint and no residue can be avoided, and the heat is not easy to generate, so that the safety use of the power battery is met.

The ultrasonic welding tooth structure of this embodiment is adopted, the welding of the low amplitude of high pressure can be carried out to can weld more foil pole piece number of piles, avoid the cantilever design, realize that pressure is lossless, effectively transmit welding area.

It should be noted that the ultrasonic welding tooth structure in this embodiment may be disposed not only in the ultrasonic welding head, but also in the ultrasonic bottom mold. In the ultrasonic welding, because the ultrasonic welding head and the ultrasonic bottom die are respectively in direct contact with a welding workpiece, the ultrasonic welding tooth structure of the embodiment can ensure the welding precision and improve the welding quality.

When the ultrasonic welding head is provided with the ultrasonic welding tooth structure of the embodiment for welding, the specific welding process is as follows:

as shown in fig. 5, the transducer a is connected with the ultrasonic welding head C through the amplitude modulator B to form an ultrasonic triple assembly, the ultrasonic welding head C is driven to descend through the air cylinder to match a certain pressing pressure, when the etched pattern rough surface contacts with a welding workpiece D (a tab foil), the tab foil is compressed with the ultrasonic bottom die E, meanwhile, the ultrasonic system works to generate high-frequency friction, and molecules permeate into each other to be combined together to form tight connection. When the cylinder is lifted up, the ultrasonic welding head C is separated from the tab foil to complete welding.

The foregoing has been a detailed description of the preferred embodiments and principles of the present invention, and it will be apparent to those skilled in the art that variations may be made in the specific embodiments based on the concepts of the present invention, and such variations are considered as within the scope of the present invention.

Claims

1. The utility model provides an ultrasonic wave welds tooth structure, its characterized in that includes first welding seal limit, second welding seal limit and welds the tooth terminal surface, it welds the tooth to be provided with a plurality of on the tooth terminal surface, weld the tooth terminal surface with between the first welding seal limit and weld the tooth terminal surface with the second welds and forms respectively between the seal limit and welds the tooth inclined plane, weld the tooth inclined plane with the contained angle that welds between the tooth terminal surface is 5 ~ 50 degrees.

2. An ultrasonic tooth construction according to claim 1 wherein a first rounded transition surface is provided between the tooth rake surface and the tooth flank surface.

3. An ultrasonic tooth welding structure according to claim 1, wherein a second rounded transition surface is provided between the inclined surface of the tooth and the first weld footprint and between the inclined surface of the tooth and the second weld footprint, respectively.

4. An ultrasonic tooth construction according to claim 1, wherein the tooth surface is provided with a roughened layer, the roughened layer being an etched pattern.

5. An ultrasonic tooth welding structure according to claim 1, wherein the welding teeth are uniformly arranged on the end faces of the welding teeth, and a gap with an equal distance is left between two adjacent welding teeth.

6. An ultrasonic tooth construction according to claim 1 wherein the tooth is of a rectangular frustum pyramid configuration with a square horizontal interface.

7. An ultrasonic tooth construction according to claim 1 wherein a third fillet transition is provided between the first and second welding lips and the tooth chamfer.

8. An ultrasonic tooth construction according to claim 1 wherein a fourth fillet transition surface is provided between the tooth rake surface and the tooth.